CN111002080A

CN111002080A - Elastic hollow precision positioning knife handle

Info

Publication number: CN111002080A
Application number: CN201911408465.XA
Authority: CN
Inventors: 刘瑞松; 陈志同; 张振洲; 侯萱
Original assignee: Zaozhuang Beihang Machine Tool Innovation Research Institute Co ltd
Current assignee: Zaozhuang Beihang Machine Tool Innovation Research Institute Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-04-14

Abstract

The application provides a hollow accurate positioning handle of a knife of elasticity relates to the precision finishing technical field, including cylindric handle of a knife body, the one end of handle of a knife body is equipped with the main shaft link, and the other end of handle of a knife body is equipped with the cutter link, and the main shaft link is the toper, and first tang terminal surface and second tang terminal surface are established with handle of a knife body junction to the main shaft link, and the tang terminal surface is located the central line of plane perpendicular to handle of a knife body. The hollow accurate positioning handle of a knife of elasticity can realize the radial and axial positioning of cutter simultaneously in this application, has realized the miniaturization of multitool head array handle of a knife and quick installation, equal altitude alignment thereof. The precision is achieved after installation: the radial runout of the knife handle is less than or equal to 0.005mm, the axial equal-height alignment is less than 0.01mm, and the precision stability in processing can be ensured.

Description

Elastic hollow precision positioning knife handle

Technical Field

The application relates to the technical field of precision machining, in particular to an elastic hollow precision positioning knife handle.

Background

The aeroengine is used as the heart of the airplane, and the development of China in the aerospace industry is directly influenced by the innovation of the production and processing technology of the aeroengine. The production difficulty of the aircraft engine lies in the processing of engine blades, and the processing cost of the blades is always high due to the complex structure, the long production period and the low qualification rate of the blades. The traditional single-spindle blade processing mode cannot meet the requirements of the market on blade production. The Chenzhi same professor of Beijing aerospace university proposes a processing mode of array grinding and polishing of the blade, changes single-spindle processing into multi-spindle synchronous processing, and can greatly improve the processing efficiency of the blade and reduce the production cost in effective time.

In the array processing technology, the machine tool is used for multi-point cutting synchronous processing, and the cutter moves along the same track, so that the requirements on the radial and axial positioning accuracy of the cutter are high. The traditional BT type tool handle and HSK tool handle have large limitation on the selection of a main shaft, so that the expansion of the array main shaft scale of the array processing technology is not facilitated, the common elastic collet chuck is connected with a grinding wheel rod and a small-sized main shaft, the grinding wheel rod needs to be subjected to radial alignment and equal-height alignment again during installation, the processing efficiency and precision are influenced, and the requirement for quick replacement of grinding and polishing of an array machine tool cannot be met.

Content of application

The elastic hollow precision positioning knife handle realizes the miniaturization of the knife handle, can realize the quick installation of a grinding wheel rod, namely, the radial alignment and the equal-height alignment do not need to be carried out again, simultaneously realizes the quick installation of the grinding wheel, and can also ensure the precision stability during the processing.

The application provides a hollow accurate positioning handle of a knife of elasticity, including cylindric handle of a knife body, the one end of handle of a knife body is equipped with the main shaft link, and the other end of handle of a knife body is equipped with the cutter link, and the main shaft link is the toper, and the main shaft link is equipped with bellied tang terminal surface with handle of a knife body junction, the central line of tang terminal surface place plane perpendicular to handle of a knife body.

Furthermore, a through hole is formed in the end part of the connecting end of the main shaft, and the center line of the through hole is overlapped with the center line of the cutter handle body.

Furthermore, the main shaft connecting end is provided with a second spigot end face, and the plane of the spigot end face is perpendicular to the central line of the cutter handle body.

Furthermore, the spigot end face is annular.

Furthermore, the diameter of the spigot end face is larger than that of the cutter handle body.

Furthermore, the main shaft connecting end, the cutter handle body and the cutter connecting end are integrally formed.

Furthermore, the cutter connecting end is provided with a mounting hole.

Furthermore, the depth of the through hole is larger than the length of the cutter connecting end.

Furthermore, the spigot end face of the cutter connecting end is annular.

Furthermore, cutter link excircle is equipped with 2 spherical grooves of symmetry.

The beneficial effect of this application lies in:

according to the elastic hollow precision positioning knife handle, the conical surface and the spigot end face are simultaneously positioned, the end part of the main shaft connecting end is hollow, elastic deformation of the conical surface is achieved, the radial deformation difference of a main shaft hole and the knife handle during high-speed machining is compensated, and axial positioning errors are completely eliminated; the spigot end face and the elastic conical surface are positioned simultaneously, so that the positioning precision and the dynamic rigidity during machining can be improved, and the precision stability is ensured. The axial positioning of the tool shank is realized at the same time of end face positioning, and equal-height alignment of the array tool shank is not needed. The quick installation is realized, namely, radial alignment and equal-height alignment are not required to be carried out again, and the precision stability can be ensured during processing.

In addition, the design principle of this application is reliable, simple structure, and the screw thread connection structure of main shaft and handle of a knife has realized the handle of a knife miniaturization, has very extensive application prospect.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a partial cross-sectional structure of a tool shank in one embodiment of the present application.

Fig. 2 is an enlarged schematic structural view of a spindle connection end in one embodiment of the present application.

FIG. 3 is a schematic view of the structure of the spindle and tool shank assembly according to an embodiment of the present application.

FIG. 4 is a schematic view of the structure of the spindle, the grinding wheel and the tool shank assembled according to an embodiment of the present application.

Fig. 5 is a schematic view of the structure in direction a of fig. 4.

In the drawing, the tool comprises a tool holder body 1, a tool holder body 2, a main shaft connecting end 3, a tool connecting end 4, a first spigot end face 5, a through hole 6, a mounting hole 7, a main shaft 8, a nut 9, a second spigot end face 10, a spacer 11, a grinding wheel 12, a backing plate 13, a screw 14 and a steel ball.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The following explains key terms appearing in the present application.

The application provides a hollow accurate positioning handle of a knife of elasticity, including cylindric handle of a knife body 1.

FIG. 1 is a schematic view of a partial cross-sectional structure of a tool shank in one embodiment of the present application. As shown in fig. 1, one end of the tool holder body 1 is a main shaft connecting end 2, and the main shaft connecting end 2 is used for connecting with a main shaft 7.

The other end of the knife handle body 1 is set as a knife connecting end 3, a mounting hole 6 is formed in the knife connecting end 3, and the knife connecting end 3 is used for connecting a knife grinding wheel.

As shown in fig. 3 and 4, the tool connecting end axially positions the grinding wheel through the spigot end face, the positioning end face is ground in a self-grinding mode to realize the equal height of the array grinding wheel, the outer circle of the spigot radially positions the grinding wheel, the steel ball 14 is axially limited through the end face friction force and the steel ball transmission torque, the spacer 10 tightly presses the backing plate 12 and the grinding wheel 11 through the tightening screw 13, and the quick installation of the grinding wheel is realized.

As shown in fig. 1, the spindle connection end 2 is conical, which mainly achieves radial positioning.

Fig. 2 is an enlarged schematic structural view of a spindle connection end in one embodiment of the present application. As shown in fig. 2, a through hole 5 is formed in the end of the main shaft connecting end 2, and the center line of the through hole 5 coincides with the center line of the tool holder body 1. As shown in fig. 2, the depth of the through-hole 5 is greater than the length of the tool coupling end 3.

The end part of the main shaft connecting end 2 is hollow, so that elastic deformation of a conical surface is realized, the radial deformation difference of a main shaft hole and a tool shank during high-speed machining is compensated, and the axial positioning error is completely eliminated.

The joint of the main shaft connecting end 2 and the knife handle body 1 is provided with a first spigot end face 4, and the plane of the first spigot end face 4 is perpendicular to the central line of the knife handle body 1.

The joint of the main shaft connecting end 2 and the knife handle body 1 is provided with a convex second spigot end face 9, and the plane of the second spigot end face 9 is perpendicular to the central line of the knife handle body 1.

In this embodiment, the first spigot end surface 4 is annular, and the diameter of the first spigot end surface 4 is larger than that of the tool holder body 1. In the actual working process, the end face of the main shaft is abutted to the spigot end face, the first spigot end face 4 mainly realizes axial positioning of the tool shank, and equal-height alignment of the array tool shank is not needed.

The first spigot end face 4 and the elastic conical surface are positioned simultaneously, so that the positioning precision and the dynamic rigidity during machining can be improved, and the precision stability is ensured.

The outer wall of the main shaft 7 is provided with an external thread, the main shaft connecting end 2 is provided with a second spigot end face 9, and the nut 8 is connected with the external thread of the main shaft 7 and the second spigot end face 9 to realize axial fixation.

In order to improve the structural strength of the cutter handle, the main shaft connecting end 2, the cutter handle body 1 and the cutter connecting end 3 are integrally formed.

According to the elastic hollow precision positioning knife handle, the connecting end of the main shaft and the connecting end of the main shaft are positioned by adopting the conical surface and the spigot end face simultaneously, the end part of the connecting end 2 of the main shaft is hollow to realize elastic deformation of the conical surface, the radial deformation difference of a main shaft hole and the knife handle during high-speed machining is compensated, and the axial positioning error is completely eliminated; the spigot end face and the elastic conical surface are positioned simultaneously, so that the positioning precision and the dynamic rigidity during machining can be improved, and the precision stability is ensured. The axial positioning of the tool shank is realized at the same time of end face positioning, and equal-height alignment of the array tool shank is not needed. Realize that the quick installation of handle of a knife need not to carry out radial alignment again and wait alignment promptly, satisfy the required precision after the installation: the radial runout of the knife handle is less than or equal to 0.005mm, the axial equal-height alignment is less than 0.01mm, and the precision stability in processing can be ensured.

The threaded connection structure of the main shaft and the tool handle realizes the miniaturization of the tool handle.

The end face of the spigot and the excircle are positioned at the same time at the connecting end with the cutter, and the axial positioning end face is ground automatically to ensure the equal height of the array grinding wheel, and the connection rigidity of the grinding wheel is improved through the friction force of the end face and the torque transmitted by the steel ball.

Although the present application has been described in detail with reference to the accompanying drawings in conjunction with the preferred embodiments, the present application is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present application by those skilled in the art without departing from the spirit and scope of the present application, and these modifications or substitutions are intended to be covered by the present application/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a hollow precision positioning handle of a knife of elasticity which characterized in that: the tool comprises a cylindrical tool handle body (1), wherein a tapered main shaft connecting end (2) is arranged at one end of the tool handle body (1), a tool connecting end (3) is arranged at the other end of the tool handle body (1), a first raised spigot end face (4) is arranged at the joint of the main shaft connecting end (2) and the tool handle body (1), and the plane where the first spigot end face (4) is located is perpendicular to the central line of the tool handle body (1).

2. The elastic hollow precision positioning knife handle according to claim 1, characterized in that: a through hole (5) is formed in the end part of the main shaft connecting end (2), and the center line of the through hole (5) is superposed with the center line of the cutter handle body (1).

3. The elastic hollow precision positioning knife handle according to claim 1, characterized in that: and a second spigot end face (9) is arranged on the outer side wall of the main shaft connecting end (2).

4. The elastic hollow precision positioning knife handle according to claim 1, characterized in that: the first spigot end surface (4) is annular.

5. The elastic hollow precision positioning knife handle according to claim 4, characterized in that: the diameter of the first spigot end face (4) is larger than that of the cutter handle body (1).

6. The elastic hollow precision positioning knife handle according to claim 1, characterized in that: the main shaft connecting end (2), the cutter handle body (1) and the cutter connecting end (3) are integrally formed.

7. The elastic hollow precision positioning knife handle according to claim 1, characterized in that: and the cutter connecting end (3) is provided with a mounting hole (6).

8. The elastic hollow precision positioning knife handle according to claim 2, characterized in that: the depth of the through hole (5) is larger than the length of the cutter connecting end (3).

9. The elastic hollow precision positioning knife handle according to claim 1, characterized in that: the first spigot end surface (4) is annular.

10. The elastic hollow precision positioning knife handle according to claim 1, characterized in that: the excircle of cutter link (3) is equipped with two symmetrical spherical grooves.